Electron discharge device of the disk seal type



Dec. 23, 19 2 P. G. BOHLKE ETAL ELECTRON DISCHARGE DEVICE OF THE DISK SEAL TYPE Filed Dec. 19, 1947 v IN V EN TORS Paul 6. B0/)l/ie Francis 6. Breeder;

At-torn e3 Patented Dec. 23, 1 952 merson-DISCHA DEVIC 9F; THE.

DISK SE XRE.

PaulG. Bohlke, Roslyn Heights, and Francis C-.

Breeden,' Flushing, N. Y., assignors' to SyIvania Electric Productslnc a corporationof Massaehusetts Application December 1 9, 1947. Serial No. 7532.186

6 Claims. (01. IMF-50.52)

I his invention relates to an electron tube and to contact structure having particular application to tubes ofthedisc-sealtype,

In special types of electron'devices, such as the cavity resonator types, disc-sea l tubes are used extensively and generally form a part of the main assembly thereof. The operation of mounting a disc-seal'tubewithin a cavity resonator has been a delicate as .well'as complicated operation, entailinagen raily, theldisassembly of the cavity unit to remove the tube, and reassembly of the cavity unit after insertion of the disc-seal type tube." The nature of the contacts for connecting thedisc-seal'type tube .to the cavity-resonatormcircuitis responsible for this tedious, d'elicatefand complicated operation. Special tools are required to assemble [and disassemble the cavity" resonator Valuable time is thus lost when it becomes'necessaryfto change tubes within theuniti for, repair or replacement pur- DQSesL' In addition to the above v the old type of electrode contactor is fragile, susceptible to. distortion and fracture with use and m e'mar snew tube pl qement e tsi e ueat- It is,.therefore,'a object oflour invention to vi iifen are. O f h -s l" it a i pro f i al e ce r n ment which facilitaes themounting and dem n ns. ofthetube th suri id 'ne'assec i ity resonator having means for electrically con,

tacting terminals of electrodes within said" tube,

irs l le eet l q'is b l iy. t am s id,

Aiurther object of the invention is to provide a s p s p at d withsa dfiub s ru e wh ch eets w thq ttiqntct acti i e t un t to determine insertion depthof the .tube within the cavity resonator unit.

Further objects and advantages of our invention will become apparent from the following description referring to the accompanying drawing and the features of novelty of our invention will be pointed out in the claims annexed to and forming part of this specification.

In the drawing:

Fig. 1 is an elevation of an electron tube and a cavity resonator.

Fig. 2 is an elevation, partlyin section, of an electron tube located in a cavity resonator.

Fig. 3 is anenlarged elevation, partlyin sec: tions, of an electron tube.

tube stop and a contactmember. 7

Fig.7 5 is an enlarged fragmentary View ofthe I tube'stop. a contact member an dl a modified of Fig. 3 designates a'pcssibletube structure em,- 20

bodying the invention herein. Thetube. structurefl comprises an envelope 2 having aeplu rality of sections such as 3, 4 and 5; a cylindrical base 6 having anvextende d member 1 atone end thereof, vand pin connectors, iifor the purpose of providing external electrical means ior electrodes (not shown) interior thetube envelope 2;

a cap 9for the purposeoi providing external electrical connection means for. another electrode (not shown) interior the'tube envelope 2'; and radial connectors Ill and .II forthe'purpose of providing electrical connection means. for. other electrodes (not shown 7 interior. the. tube envee.

lope 2. 7

It is tobe notedthat section 3. and 4 .oien

velope 2 are separated by ad is r-.12which forms a pa t. of l tr e co nec or 0-, n o e d tail.

electrode connector l0 is formed by causing disc l2 to be spun over a metal ring l3 having .a first portion, [3a, of substantially uniform diameter, and having a chamfered edge l4 or a second portion of diminishing diameter, and a shoulder l5. The disc I2 is spunover said ring i3-in av manner to retain the shoulder IS in a plane perpendicular to the longitudinal axis of the tube structure I, and provide a guide and contact sur-; face Ma ci diminishing, diameter, and a contact surface! 0a of uniform diameter.

Sections 4 and 5 of the envelope: are likewise separated by a disc IS/which forms apart of electrode connector I I. In more detail, electrode H connector H is formed bycausin disc, lfi to be spun over another metal ring, having a,

diameter equal to or in excess of the diameter of ring 13, so as to form a connector equal to Fig. 4 is an enlarged fragmentary view of the or larger in diameter than the diameter of connector II.

The construction of an electron tube in this manner is particularly beneficial for the reasons that, the electrode connectors l and H achieve mechanical strength; the choice of diameters for said electrode connectors permits the mounting of the tube structure I in a manner wherein both connectors are engaged with cavity resonator contacts in one operation; the depth to which the tube is inserted into a cavity is controlled by means of the shoulder coming into contact with a stop within the cavity resonator assembly; and the cavity resonator may be constructed to have the contact means therein form a path for electrical currents at the electrode plane if desired.

The utility and novelty of the invention may be more fully appreciated by reference to Figs. 1 and 2. With reference to Figs. 1 and 2, cavity resonator I8 comprises cylinders 19 and 2|] having contact members 2| and 22 respectively. For the purpose of illustration, the inside radius of contactor 2! has been chosen as smaller than the inside radius of contactor 22. When the tube is inserted in the cavity resonator it is seen that mounting is facilitated in that if the average longitudinal axis of the tube structure is not perpendicular to the transverse plane of contactors 2|, the contactor would nevertheless ride on chamfered edge Ma, and down to the electrode contactor surface Illa of disc 12, thus not bending or otherwise injuring the contactor member 2| or electrode connector ID. The average longitudinal axis of the tube structure is brought into alignment with the cavity resonator when the tube electrode connector II is inserted in cavity connector 22, causing shoulder I5 to abut the inside cylinder stop 23 and determine the distance to which the tube structure I may be inserted within the cavity l8. Tubes removed and reinserted are thus always inserted to the same depth.

In adapting the invention to tube contact structures, various structural features may become a matter of choice within the scope of the invention disclosed. For example, the shoulder and chamfered edge may be modified as shown in Fig. 5 wherein corresponding parts are identically numbered. The tube contact members may be formed of any suitable material and the reinforcing ring may be eliminated. Therefore, although we have shown and described a particular embodiment of our invention, we do not desire to be limited to the embodiment set forth. It is our intention to cover all modifications as may come within the scope of the ra-- pended claims.

We claim:

1. An electron tube including an envelope, a metal ring surrounding said envelope, said ring having a chamfered edge, and an annular terminal sealed through said envelope and lying against the edge of said ring remote from the chamfered edge of said ring and lying over the outer surface of said ring including said chamfered edge.

2. An electron tube including an envelope, a first metal ring surrounding said envelope, a

first annular terminal sealed through said envelope and lying over the outer surface of said first rin a second metal ring of smaller diameter than said first ring and having a first portion of substantially uniform diameter and a second portion of diminishing diameter terminating in an end abutment on the side thereof remote the first ring, and a second annular terminal sealed through said envelope and lying over the outer surface of said uniform diameter portion and diminishing diameter portion of said second ring, I

3. An electron tube including an envelope, a first metal ring surrounding said envelope, an annular terminal sealed through said envelope and lying over the outer surface of said first ring, a second ring of smaller diameter surrounding said envelope, said second ring having a chamfered edge, a second annular terminal sealed through said envelope at the side of said ring remote the chamfered edge of said ring, said second annular terminal overlying the outer surface of said second ring.

4. An electron tube including an envelope, an electrode terminal at a longitudinal extremity of said envelope, a metal ring having a first portion of a fixed outer diameter and a second portion of diminishing diameter in a direction facing said electrode terminal and mounted in a plane with said diameters perpendicular to, the longitudinal axis of said envelope and an annular electrode sealed through said envelope and formed over the outer surface of said ring.

5. An electron tube including an envelope, a

plurality of electrode connecting terminals at the longitudinal extremities of said envelope, a, first metal ring surrounding said envelope, and posi'- tioned in a plane perpendicular to the longitudinal axis of said envelope, a first annular terminal sealed through said envelope and formed over the outer surface of said first ring, a second metal ring of smaller diameter than said first ring and having a portion of its outer diameter diminishing on theside remote saidfirst ring and positioned in a, plane perpendicular to the longitudinal axis of said envelope, a second annular terminal sealed through said envelope and formed to lie over the outer surface of said second ring.

6. An electron tube comprising an envelope, a first metal ring surrounding a portion of said envelope, a first annular terminal sealed through said envelope and formed to lie over said envelope and formed to lie over the outer surface of said second ring in a direction opposite to said first beaded over annular terminal.

PAUL G. BOHLKE. FRANCIS C. BREEDEN.

REFERENCES CITED The following references are of record inthe file of this patent.

UNITED STATES PATENTS Number Name Date 2,278,210 Morton Mar. 31, 1942 2,408,355 Turner Sept-24, 1946 2,419,578 Litton Apr. 29,1 47" 2,432,789 OLarte et al. Dec. 16, 1947 2,446,271 Eitel Aug'. 3, 1948 2,455,868 Koch 'Dec. 7, i948 FOREIGN PATENTS' Number Country Date France NOV. 18, 1939" 

